A hybrid (hydro-numerical) circulatory model: investigations of mechanical aortic valves and a numerical valve model

• Autorzy: Kozarski M. , Suwalski P. , Zieliński K. , Górczyńska K. , Szafron B. , Pałko K. J. , Smoczyński R. , Darowski M.

Identyfikatory

DOI

10.1515/bpasts-2015-0071

• Języki publikacji: EN

Abstrakty

EN

In most cases of diseased heart valves, they can be repaired or replaced with biological or mechanical prostheses. Biological prostheses seem to be safer than mechanical ones and are applied with good clinical outcomes. Their disadvantage, when compared with mechanical valves, is durability. In the development and application of mechanical and biological heart valves, a significant role can be played by a Hybrid (Hydro-Numerical) Circulatory Model. The aim of this paper is to demonstrate the opportunities created by the hybrid model for investigations of mechanical heart valves and their computer models under conditions similar to those of the circulatory system. A diode-resistor numerical valve model and three different design mechanical aortic valves were tested. To perform their investigations, computer applications were developed under RT LabView to be run on a PC. Static and dynamic characteristics of the valves were measured and registered - pressure in the numerical time-varying elastance left ventricle (pLV), in the aorta (pas) and flow (f), proving, among other factors, that 1) time delay of pas with respect to pLV is mainly related to the valve’s opening time, and 2) the valves of substantially different designs tested under identical hydrodynamic conditions reveal nearly the same dynamic performance.

Słowa kluczowe

EN

biological and mechanical heart valves; numerical heart valve; hybrid (hydro-numerical) circulatory model; voltage-controlled hydraulic pressure (flow) source; hydraulic input impedance; varying-elastance left ventricle

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2015
• Tom: Vol. 63, nr 3
• Strony: 605--612
• Opis fizyczny: Bibliogr. 22 poz., rys., wykr., tab.

Twórcy

autor

Kozarski M.

• Nałęcz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, 4 Ks. Trojdena St., 02-109 Warsaw, Poland

autor

Suwalski P.

• Department of Cardiac Surgery, Central Teaching Hospital Ministry of Interior, 137 Wołoska St., 02-507 Warsaw, Poland
• Kazimierz Pułaski University of Technology and Humanities, 29 Malczewskiego St., 26-600 Radom, Poland

autor

Zieliński K.

• Nałęcz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, 4 Ks. Trojdena St., 02-109 Warsaw, Poland

autor

Górczyńska K.

• Nałęcz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, 4 Ks. Trojdena St., 02-109 Warsaw, Poland

autor

Szafron B.

• Department of Cardiac Surgery, Central Teaching Hospital Ministry of Interior, 137 Wołoska St., 02-507 Warsaw, Poland

autor

Pałko K. J.

• Nałęcz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, 4 Ks. Trojdena St., 02-109 Warsaw, Poland

autor

Smoczyński R.

• Department of Cardiac Surgery, Central Teaching Hospital Ministry of Interior, 137 Wołoska St., 02-507 Warsaw, Poland

autor

Darowski M.

• Nałęcz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, 4 Ks. Trojdena St., 02-109 Warsaw, Poland

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